$F13E/61758: Get a byte
F13E: A5 99 LDA $99 ; Default Input Device (0)
F140: D0 08 BNE $F14A
F142: A5 C6 LDA $C6 ; Number of Characters in Keyboard Buffer queue
F144: F0 0F BEQ $F155
F146: 78 SEI
F147: 4C B4 E5 JMP $E5B4 ; Get Character From Keyboard Buffer
Jump from $F140:
F14A: C9 02 CMP #$02
F14C: D0 18 BNE $F166 ; Input a byte
Jump from $F1B8:
F14E: 84 97 STY $97 ; Storage of Y Register during RS232 fetch
F150: 20 86 F0 JSR $F086 ; Get From RS232
F153: A4 97 LDY $97 ; Storage of Y Register during RS232 fetch
Jump from $F144:
F155: 18 CLC
F156: 60 RTS
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